package com.jeemicro.weixin.modules.timer_quartz.utils;

import java.util.Locale;

import javax.servlet.http.HttpServletRequest;

import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.web.servlet.i18n.SessionLocaleResolver;

public class SpringContextUtil implements ApplicationContextAware{
	private static ApplicationContext applicationContext;  

	  /** 
     * 实现ApplicationContextAware接口的context注入函数, 将其存入静态变量. 
     */  
    public void setApplicationContext(ApplicationContext applicationContext) {  
        SpringContextUtil.applicationContext = applicationContext;  
    }  
  
    /** 
     * 取得存储在静态变量中的ApplicationContext. 
     */  
    public static ApplicationContext getApplicationContext() {  
        checkApplicationContext();  
        return applicationContext;  
    }  
  
    /** 
     * 从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型. 
     */  
    @SuppressWarnings("unchecked")  
    public static <T> T getBean(String name) {  
        checkApplicationContext();  
        return (T) applicationContext.getBean(name);  
    }  
  
    /** 
     * 从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型. 
     */  
    @SuppressWarnings("unchecked")  
    public static <T> T getBean(Class<T> clazz) {  
        checkApplicationContext();  
        return (T) applicationContext.getBeansOfType(clazz);  
    }  
  
    private static void checkApplicationContext() {  
        if (applicationContext == null)  
            throw new IllegalStateException("applicaitonContext未注入,请在spring-mvc.xml中定义SpringContextUtil");  
    }  
  
    public static String getMessage(String key, HttpServletRequest request) {  
        return applicationContext.getMessage(key, null, getLocal(request));  
    }  
  
    public static String getMessage(String key, String[] args, HttpServletRequest request) {  
        return applicationContext.getMessage(key, args, getLocal(request));  
    }  
  
    public static Locale getLocal(HttpServletRequest request) {  
        Locale locale = (Locale) request.getSession().getAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME);  
        if (locale == null) {  
            locale = request.getLocale();  
        }  
  
        return locale;  
    }  
}
